Inrush Current

Result 13 -26_Inrush_Current_115V-230V.png

Result 14 -27_Inrush_Current_Comparison_115V

The inrush current is at normal levels with 115V input, but it's quite high at 230V.

Load Regulation And Efficiency Measurements

The first set of tests reveals the stability of the voltage rails and the 750 B3's efficiency. The applied load equals (approximately) 10 to 110 percent of the PSU's maximum load in increments of 10 percentage points.

We conducted two additional tests. During the first, we stressed the two minor rails (5V and 3.3V) with a high load, while the load at +12V was only 0.1A. This test reveals whether a PSU is compatible with Intel's C6/C7 sleep states or not. In the second test, we determined the maximum load the +12V rail could handle with minimal load on the minor rails.

Test #

12V

5V

3.3V

5VSB

DC/AC (Watts)

Efficiency

Fan Speed

PSU Noise

Temps (In/Out)

PF/AC Volts

1

4.385A

1.984A

1.984A

0.985A

74.767

78.388%

0 RPM

<6.0 dB(A)

42.57°C

0.956

12.127V

5.050V

3.320V

5.060V

95.381

38.14°C

115.19V

2

9.808A

2.971A

2.981A

1.188A

149.737

82.908%

1180 RPM

26.7 dB(A)

40.01°C

0.982

12.120V

5.044V

3.317V

5.042V

180.607

44.56°C

115.19V

3

15.583A

3.479A

3.496A

1.391A

224.879

85.474%

1218 RPM

27.3 dB(A)

40.19°C

0.989

12.114V

5.039V

3.314V

5.025V

263.096

44.85°C

115.20V

4

21.355A

3.977A

3.983A

1.595A

299.740

86.755%

1240 RPM

27.8 dB(A)

40.40°C

0.992

12.107V

5.035V

3.311V

5.005V

345.503

45.39°C

115.19V

5

26.802A

4.974A

4.986A

1.803A

374.721

86.934%

1315 RPM

30.4 dB(A)

40.85°C

0.994

12.097V

5.030V

3.307V

4.985V

431.041

46.07°C

115.19V

6

32.255A

5.975A

5.991A

2.010A

449.621

86.672%

1425 RPM

32.3 dB(A)

41.39°C

0.995

12.086V

5.024V

3.303V

4.965V

518.762

46.64°C

115.19V

7

37.723A

6.982A

6.996A

2.222A

524.620

86.079%

1518 RPM

35.4 dB(A)

42.14°C

0.996

12.075V

5.019V

3.300V

4.944V

609.464

47.49°C

115.22V

8

43.204A

7.984A

8.010A

2.435A

599.523

85.391%

1645 RPM

37.4 dB(A)

42.86°C

0.996

12.062V

5.012V

3.295V

4.923V

702.091

48.44°C

115.19V

9

49.128A

8.487A

8.535A

2.440A

674.581

84.523%

1796 RPM

41.4 dB(A)

44.65°C

0.996

12.050V

5.009V

3.292V

4.910V

798.101

50.49°C

115.19V

10

54.814A

9.002A

9.050A

3.078A

749.458

83.619%

1910 RPM

42.1 dB(A)

45.68°C

0.996

12.036V

5.004V

3.281V

4.866V

896.273

51.81°C

115.19V

11

61.100A

9.012A

9.065A

3.085A

824.374

82.633%

2014 RPM

43.1 dB(A)

47.08°C

0.997

12.024V

4.998V

3.275V

4.855V

997.629

53.48°C

115.18V

CL1

0.098A

14.027A

14.003A

0.004A

117.483

75.801%

1425 RPM

32.3 dB(A)

44.06°C

0.977

12.119V

5.027V

3.268V

5.087V

154.989

49.72°C

115.20V

CL2

62.446A

1.003A

1.002A

1.002A

764.673

83.995%

1945 RPM

42.1 dB(A)

46.78°C

0.997

12.032V

5.013V

3.287V

4.991V

910.382

52.70°C

115.19V

Load regulation is fairly tight on all of the rails except for 5VSB, which is worth noting from a budget-oriented platform. Meanwhile, the 750 B3 delivers full power at very high ambient temperatures (>45°C) without breaking a sweat. Its output noise remains low until the 50% load test, after which it exceeds 30 dB(A) during the sixth test and more than 40 dB(A) from the ninth test and up. Generally, though, the fan profile isn't that aggressive, considering this is a relatively low-efficiency PSU.

Several complaints in the forums from builders , very disappointed with the B3 series.

logainofhades

Yea, I will no longer recommend a B3 series PSU. Seasonic and Corsair's new CX450m-650m are better options right now.

SinxarKnights

The solder quality between review samples and retail samples is pretty shady in of itself IMO.

10tacle

The fact that EVGA hasn't even responded to the 450W B3 fail test that was back in August is highly disturbing in an of itself. It is inexcusable to just ignore a tech website's inquiry (and serious concerns) as to why a series of their products are failing. I know EVGA's customer support is top notch in the industry (I've had to use it), but their public/customer relations team needs an overhaul. If I were the CEO, I'd be calling for some heads and light a fire under some backsides to ride Super Flower hard for a fix.

maxwellmelon

with out them identifying the failed component how can they say that the PSU not turning back on after a OPP is not intentional setup because it being shut down at 120% of load is about right like they said. It could be designed that way as a safety feature. and a way to sell more psu because when you try to RMA it they can say you overloaded it and is not covered. Operating above 750 watts is above the psu limits and having a one time OPP shut down is still technically having OPP on it.

Aris_Mp

When a PSU is broken after OPP's triggering, it is not a feature but a problem. OPP along with the rest of the protections is there to protect the PSU in order not to break when a user goes wild with it.

Lutfij

The third paragraph of the last page reminded me of what cars with all souped up aftermarket parts but a crappy driver often results with - disaster.

EVGA Have recently come under flack on other forums as well and their response isn't, erm, admirable. Nice work with the review, Aris, keep it up!

rtansey378

They must be having issues in the CS department. After dealing with them for an RMA I found their website to be down totally twice and fundamentally broken in important other areas during RMA submission. I was getting different answers from different people to basic questions and there were unreturned emails that led to other issues - it was kind of a nightmare overall that went on for a month. Even after being expedited to a manager of some type it wasn't much better. And their 2-3 advance RMA uses UPS ground so it is not 2-3 days at all. It routinely takes them 3 days to get the replacement into UPS' hands and then UPS takes their sweet time. People also use their expensive desktop PCs for work. I went through that twice as they sent the wrong unit back the first time.

They charge a premium largely on their CS reputation. I guess they are now hoping people won't have to use it and learn otherwise. Being branded as a good guy in the CS is huge. Being branded as a bad guy is a death sentence. You'd think they would at least return major website emails and spin use some good old corporate spin. They won't even do that. Makes you wonder.

I hope they figure it out. But Im no longer going to pay their premium. If they have the cheaper product then I would still consider them. That will rarely be the case. They did some nice patented stuff with their GTX 1070/1080 revisions so maybe they are putting all their eggs in that basket.

mlee 2500

Wow, I expect better from something EVGA puts their name on.

THANK YOU tom's HARDWARE for performing objective tests on multiple samples to keep us informed and the vendors honest....

I seriously could have seen myself buying my next PSU based on EVGA's reputation alone. I won't make that that mistake now.